What happens if you try to connect an Imp to a wifi spot where they require you to click a button on a page to get internet access?
You’re out of luck unless you can get the network administrator to put an exception on their network to allow the imp’s MAC address to bypass this web page.
We’ve run up against a similar situation, but are likely being permitted to attach our own WAP on their network to set up our own secure WiFi network for our imp. The port to which we will connect our WAP on their network switch will only have access to the Internet–nothing else on the LAN.